Improvement in stone-drilling machines



C. L'O'HNES &. B. FLOWERS.

Stone-Drilling Machines.

Patented Dec.8,1374.

r I m UNITED S'rarns rrrcn.

CONRAD LOHNES AND RAPHAEL FLOWERS, OF SPRINGFIELD, OHIO.

IMPROVEMENT IN STONE-DRILLING MACHINES.

Specification forming part of Letters Patent No. 15?,454, dated December 8, 1874; application iled November 20, 1874.

To all whom it may concern:

Be it known that we, CONRAD LOHNES and RAPHAEL Fnownns, of Springfield, in the county of Clarke and State of Ohio, have invented certain Improvements in StoneDrilling Machines, of which the following is a speci fication:

Our invention relates to that class of portable rock-drilling machines in which, by the turning of a hand-crank, cams are caused to raise the drill and allow it to drop; and the invention consists in a novel arrangement of mechanism for operating the drill, giving the same a rotary motion, and changing the force of its blow.

Figure 1 is a perspective view of our machine; Fig. 2, a view, showing the devices by which the drill is given the rotary or turning motion; Fig. 3, another view, illustrating the same feature; and Fig. 4, a view, showing the devices by which the force of the blow is regulated.

In building our machine, we construct a suitable frame, A, and pivot in one end thereof a standard or upright, G, which is provided on its inner side with two arms, 0 and d, through which the drill-rod K passes, and also provided in its upper end with a pulley, I, carrying the rope J, by which the drill is suspended, as shown in Figs. 1 and 2. 0n the side of the standard G I pivot an elbow-lever, H, and above and outside of said lever, on a supporting-arm, n, mount a pulley, a, as shown in Fig. l. The rope J, by which the drill is suspended, is passed over the wheel I, downward under the pulley a, and then attached to the upper end or arm of the elbow-lever H. as shown. Across the frame A, near the drill, we mount a shaft, B, provided with a hand crank, O, and with two cams, D, which act alternately against the lower end or arm of the lever H, turning the same so as to draw on the rope and lift the drill, and then slipping off and allowing the drill to drop, the drill being dropped by each cam, or twice at each revolution of the crank. The descent of the drill is accelerated by a spiral spring, S, mounted upon it below the arm 0, and bearing on a collar, R, also mounted on the drill. The collar is held by a screw, m, so that it maybe adjusted to vary the tension of the spring, or

to permit the drill to be lowered or withdrawn. In order to vary the force with which the drill strikes without adjusting the collar It, the upper end of the elbow-lever H, to which the rope J is connected, is provided with a drum orwindlass, P, to which the rope is attached, as shown in Figs. 1 and 2. This drum is provided on one end with a handcrank, c, and at the other with a ratchetwheel, j, which is held by a pawl, g, pivoted to the lever H, and held up in contact with the wheel by a spring, h, as shown in Figs. 1 and 4.. By turning the crank c the rope J may be wound up on the drum, and thereby shortened, so that the drill will be raised to a higher point, the spring compressed to a greater de' gree, and, consequently, the drill caused to strike with greater force.

It will thus be seen that by the above arrangement the operator is enabled to control or regulate the force with which the drill strikes easily and quickly, and without leaving his position at the driving-crank, or stopping the operation of the machine.

In order to give the drill a rotary or turning motion, so that its cutting-edge may strike in different positions, I mount upon it a pinion, L, and mount on the shaft B a disk or wheel, E, having on its side ribs or teeth 0, which engage with and turn the pinion L, as shown in Figs. 1, 2, and 3. The pinion is held in a slot or recess in the arm d, and is provided with a spline or feather, which fits into a longitudinal slot in the drill,'so that it turns the drill with it, while at the same time the drill is free to slide up and down through the pinion. It is desirable in practice to have the drill turn as it rises, and then drop straight down without any rotary motion during its descent. In order to accomplish this the threads or teeth 0 which turn the drill are made eccentric with the shaft B for a portion of their length, and concentric therewith the remainder of their length, and the parts are so arranged that, as the cams are raising the drill, the eccentric portions of the thread act and turn the same, and then, while the drill is descending, the concentric portion of the threads or teeth act and hold the drill from turning, so that, while the threads have a continuous motion, they impart an intermittent rotary motion to the drill. In order that the drill may turn freely, the rope is connected thereto by a swivel, b, as shown. The standard or upright G which supports the drill is held by arms 12, mounted on or around the shaft B, so that it may be adjusted to incline the drill at any desired angle without changin g the relative positions of the working parts, or interfering with their operation. The arms 10 are provided with curved slots j concentric with shaft B, through which clamping or fastening bolts k are passed into the frame, so that, by simply loosening said bolts, the standard G may be released and permitted to tip. In order that the machine may be used with a strong spring on the drill, and caused to run steadily I mount on the frame a second transverse shaft, M, provided with a fly-wheel, N and with a driving-pinion, which gears into a wheel, F, on the shaft 0, so that a rapid motion is given to the fly-wheel.

The machine constructed as above is very cheap, simple, and compact; is easily operated, readily transported, and operates with great rapidity.

Having thus described our invention, what we claim is- 1. In combination with the drill-rope J,elbowlever H, and cams D, mounted on the shaft 13, having the hand-crank attached, the drum I mounted on the lever H, and provided with the crank 0, so that it maybe turned by the operator while at his post, and without stopping the machine.

2. In combination with the drill-rod K and pinion L, the disk E, having the ribs or threads 0 concentric with the disk a portion of their length, and eccentric thereto the remainder of their length, arranged to give the drill a rotary movement during its ascent, and hold it from rotating as it descends, as shown and described.

hi CONRAD XS LoHNEs.

' mark.

RAPHAEL FLOWERS.

Witnesses:

P. T. DODGE, J. MCKENNEY. 

